newsgroup

One of Usenet's huge collection of topic groups
or fora. Usenet groups can be "unmoderated" (anyone can
post) or "moderated" (submissions are automatically directed
to a moderator, who edits or filters and then posts the
results). Some newsgroups have parallel mailing lists for
Internet people with no netnews access, with postings to the
group automatically propagated to the list and vice versa.
Some moderated groups (especially those which are actually
gatewayed Internetmailing lists) are distributed as
"digests", with groups of postings periodically collected
into a single large posting with an index.